package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;



@Service
@Slf4j
public class UserServiceImpl implements UserService {


//    @SuppressWarnings("SpringJavaInjectionPointsAutowiringInspection")
    @Autowired
    private WeChatProperties weChatProperties;

//    @SuppressWarnings("SpringJavaInjectionPointsAutowiringInspection")
    @Autowired
    private UserMapper userMapper;

    // 微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";



    /**
     * 微信登陆
     * @param userLoginDTO
     * @return
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        // 调用微信接口服务，获取当前用户的openid
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String jsonString = HttpClientUtil.doGet(WX_LOGIN, map);

        // 转换json字符串数据--获取用户唯一标识
        JSONObject jsonObject = JSON.parseObject(jsonString);
        String openid = jsonObject.getString("openid");

        // 判断opened是否为空，为空抛出异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        // 没有异常就是合法的用户,在判断当前用户是否为当前系统的新用户
        User user = userMapper.getByOpenId(openid);

        // 如果是新用户，就自动注册保存
        if(user == null){
            log.info("该用户为新用户");
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            // 插入数据，返回ID值
            userMapper.insert(user);
        }
        return user;
    }
}
